Height-adjustable lattice type composite beam bearing plate

Abstract

The utility model provides a height-adjustable lattice type composite beam bearing plate, which comprises a reinforced concrete structure bottom plate, a lattice type steel beam and a U-shaped buckle support, the U-shaped buckle support is fixed on the reinforced concrete structure bottom plate, and the lattice type steel beam is inserted on the U-shaped buckle support and is fixed through a shear bolt. According to the utility model, the height of the lattice type steel beam is adjusted to ensure that the rigidity of the reinforced concrete structure bottom plate meets the maximum test load. The insertion depth is determined according to the test foundation pressure, and then the anti-shear bolts are used for fixing. The lattice type steel beam at the upper part uniformly transmits the load to the bottom plate of the reinforced concrete structure at the lower part according to the determined rigidity, so that the periphery of the bottom plate of the reinforced concrete structure is prevented from warping, the stability and the safety of the whole structure are ensured, and more real and reliable experimental data are measured.

Description

Technical Field

[0001] The utility model relates to the technical field of composite foundation detection, in particular to a height-adjustable lattice composite beam pressure plate. Background Art

[0002] In recent years, various types of composite foundation technologies have been widely used. Composite foundation is an artificial foundation in which part of the soil is reinforced or replaced, forming a load-bearing composite foundation of foundation soil and vertical reinforcement. There are mainly sand and gravel pile composite foundation, cement fly ash gravel pile composite foundation, compacted cement soil pile composite foundation, cement soil mixing pile composite foundation, rotary jet pile composite foundation, ash soil pile composite foundation, multi-pile composite foundation and other types.

[0003] The pressure plate is an important equipment in the static load test of composite foundation. In order to accurately reflect the bearing capacity of composite foundation, the pressure plate must have sufficient rigidity and economy. With the development of foundation treatment technology and composite foundation theory, the foundation treatment area of ​​a single pile has reached more than ten square meters. In the existing technology, the pressure plate will warp around or be too thick and heavy when loaded. Simply increasing the thickness of the pressure plate will cause material waste and increase the difficulty of test operation. Now there is a need for a pressure plate that meets the rigidity requirements and is economical and reasonable. Utility Model Content

[0004] The utility model aims to provide a lattice composite beam pressure plate with adjustable height, so as to prevent the warping of the reinforced concrete structure bottom plate around, ensure the stability and safety of the whole structure, and measure more real and reliable experimental data.

[0005] According to the purpose of the utility model, the utility model provides an adjustable height lattice composite beam pressure plate, including a reinforced concrete structure base plate, a lattice steel beam and a U-shaped clip support, the U-shaped clip support is fixed on the reinforced concrete structure base plate, the lattice steel beam is inserted into the U-shaped clip support and fixed by shear bolts.

[0006] Furthermore, the reinforced concrete structural base plate includes a reinforced concrete base plate and a steel embedded component skeleton, and the steel embedded component skeleton is arranged inside the reinforced concrete base plate.

[0007] Furthermore, the reinforced concrete base plate is a rectangular structure, and the reinforced concrete base plate is provided with longitudinal and transverse steel bars and vertical hook bars.

[0008] Furthermore, the steel embedded part skeleton is a flat steel plate, an anti-slip shear key is fixed to the lower surface of the steel embedded part skeleton, and a screw is fixed to the upper surface of the steel embedded part skeleton.

[0009] Furthermore, the screws are arranged in double rows in parallel, and the spacing between the screws is less than 300 mm.

[0010] Furthermore, the lattice steel beam includes a plurality of cross-arranged fold line steel beams, a rigid web is fixed to the bottom of the cross-arranged fold line steel beam, a compressive steel pipe is provided at the center position of the cross-arranged fold line steel beam, the side wall of the compressive steel pipe is fixedly connected to the cross position of the fold line steel beam through four X-shaped shear webs, and the fold line steel beams are connected by I-beam supports.

[0011] Furthermore, the cross-sectional area of ​​the middle portion of the broken-line steel beam is larger than the cross-sectional areas on both sides.

[0012] Furthermore, the longitudinal axis of the fold line steel beam is a three-section fold line structure, the middle section of the fold line steel beam is a horizontal section, the front section and the rear section of the fold line steel beam are inclined downward, and the front section and the rear section of the fold line steel beam form an angle of 15° to 40° with the horizontal line.

[0013] Furthermore, the upper edge of the rigid web is fixedly connected to the lower flange of the broken-line steel beam, and a row of through holes is provided at the lower end of the rigid web.

[0014] Furthermore, the U-shaped snap-on support includes a U-shaped groove seat, stiffening ribs and connecting flanges, the connecting flanges are fixed to the bottom of the U-shaped groove seat, the stiffening ribs are provided on the side walls of the U-shaped groove seat, and the U-shaped groove seat is provided with multiple rows of parallel connecting holes, and the connecting flanges and the steel embedded part skeleton are connected by bolts.

[0015] The technical solution of the utility model adjusts the height of the lattice steel beam to ensure that the rigidity of the reinforced concrete structure bottom plate meets the maximum test load. According to the test foundation pressure, the insertion depth is determined, and then fixed by shear bolts. The upper lattice steel beam transfers the added load to the lower reinforced concrete structure bottom plate evenly with the determined rigidity, preventing the reinforced concrete structure bottom plate from warping around, ensuring the stability and safety of the entire structure, and measuring more real and reliable experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2This is a schematic diagram of the structure of the lattice steel beam and the U-shaped buckle support in the embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of a U-shaped buckle support according to an embodiment of the utility model;

[0020] Figure 4 A side view of an embodiment of the utility model;

[0021] In the figure: 1. Reinforced concrete structural base plate; 11. Reinforced concrete base plate; 12. Steel embedded parts skeleton;

[0022] 2. Lattice steel beam; 21. Broken line steel beam; 22. Rigidity web; 23. Compression steel pipe; 24. X-shaped shear web; 25. I-beam support;

[0023] 3. U-shaped snap support; 31. U-shaped groove seat; 32. Stiffening rib; 33. Connecting flange. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Example 1

[0028] like Figure 1-Figure 4 As shown,

[0029] A height-adjustable lattice composite beam pressure plate comprises a reinforced concrete structure bottom plate 1 of a regular shape structure, a lattice steel beam 2 and a U-shaped buckle support 3, wherein the U-shaped buckle support 3 is fixed on the reinforced concrete structure bottom plate 1, and the lattice steel beam 2 is inserted into and fixed in a groove of the U-shaped buckle support 3. The U-shaped buckle support 3 and the reinforced concrete structure bottom plate 1 are connected together by bolts, and the lattice steel beam 2 is inserted into the U-shaped buckle support 3, and the insertion depth is determined according to the test foundation pressure, and then fixed by shear bolts.

[0030] Specifically, the reinforced concrete structure base plate 1 includes a reinforced concrete base plate 11 and a steel embedded part skeleton 12. The steel embedded part skeleton 12 is arranged inside the reinforced concrete base plate 11. The reinforced concrete base plate 11 is rectangular in shape. The reinforced concrete base plate 11 is provided with longitudinal and transverse steel bars and is equipped with vertical hook bars. The steel bars are denser at the steel embedded part skeleton 12. The steel embedded part skeleton 12 is a concentrated load site. The role of the dense steel bars is to set a dense steel bar area at the position where the force is concentrated, which can effectively disperse and bear the load, prevent local damage, and enhance the force bearing capacity of the structure at this location.

[0031] The steel embedded frame 12 is a flat steel plate, the lower surface of which is welded with an anti-slip shear key, and the upper surface of which is welded with a screw rod, the screw rod having a diameter greater than 12 mm, and arranged in double rows in parallel with a spacing less than 300 mm.

[0032] The main function of the steel embedded part skeleton 12 is to fix the upper U-shaped snap-in support 3. The anti-slip shear key can strengthen the constraint of the concrete on the orthogonal steel embedded part skeleton 12, preventing the relative displacement of the concrete and the steel embedded part skeleton 12, so that the steel skeleton and concrete in the composite structure pressure plate are in a common working state throughout the entire force-bearing process.

[0033] The lattice steel beam 2 is an important component to ensure the stiffness of the pressure plate of the adjustable height lattice composite beam. The lattice steel beam 2 includes a plurality of cross-arranged zigzag steel beams 21. A rigid web 22 is fixed to the bottom of the cross-arranged zigzag steel beam 21. A compression steel pipe 23 is provided at the center of the cross-arranged zigzag steel beam 21. The side walls of the compression steel pipe 23 are fixedly connected to the intersection of the zigzag steel beams 21 through four X-shaped shear webs 24. An I-beam support 25 is fixedly provided between the zigzag steel beams 21.

[0034] Specifically, the broken line steel beam 21 adopts a variable cross-section design, and different cross-sectional shapes and sizes are used at different cross-sectional positions of the beam, which can make more efficient use of materials. A larger cross-section is used where the bending moment is larger, and a smaller cross-section is used where the bending moment is smaller. Compared with beams or columns with equal cross-sections, variable cross-section components can save materials and reduce deadweight. The cross-sectional shape and size can also be adjusted according to the force conditions, so that the beam can better share and resist the moment when subjected to bending moment to ensure rigidity. In this embodiment, the closer the broken line steel beam 21 is to the middle of the pressure plate, the larger the cross-sectional area. The longitudinal axis of the broken line steel beam 21 is a three-segment broken line, the middle segment is horizontal, and the two segments are downward and the horizontal line is 15° to 40°.

[0035] The rigid web 22 has the function of improving the structural stability and bending rigidity, and is helpful to improve the bearing capacity and rigidity of the lattice steel beam; the upper edge of the rigid web 22 is welded to the lower flange of the broken line steel beam 21, butt welding is adopted, and the chamfer is processed. The rigid web 22 is punched 100mm away from the lower end, the hole diameter is greater than 12mm, the spacing is less than 300mm, and sandblasting is performed to eliminate stress.

[0036] The pressure steel pipe 23 is used for setting up the upper loading jack and transferring the load. The steel pad and the jack are set up on the upper section of the pressure steel pipe 23 .

[0037] The X-shaped shear web 24 ensures the transmission of shear force and can ensure that the compressed steel pipe will not undergo compression buckling and unstable deformation under the test load; one side of the X-shaped shear web 24 is connected to the compressed steel pipe 23, and the other side of the X-shaped shear web 24 is connected to the stiffness web 22 and the broken line steel beam 21, transmitting the shear force to the lattice steel beam 2.

[0038] The I-beam support 25 as a reinforcement structure can ensure the stability of the lattice steel beam 2 under a larger test load. When the test base pressure is larger, the I-beam support 25 connects the parallel broken line steel beams 21 together through angle steels.

[0039] The U-shaped snap-on support 3 comprises a U-shaped groove seat 31 , a stiffening rib 32 and a connecting flange 33 . The connecting flange 33 is fixed to the bottom of the U-shaped groove seat 31 , and the stiffening rib 32 is provided on the side wall of the U-shaped groove seat 31 .

[0040] The bottom of the U-shaped clip support 3 is connected to the reinforced concrete structure base plate 1 through the connecting flange 33, and the U-shaped groove seat 31 on the upper part of the U-shaped clip support 3 is connected to the lattice steel beam 2. The U-shaped clip support 3 works together with the lattice steel beam 2 to control the stiffness of the pressure plate by adjusting the web height. The U-shaped groove seat 31 is used to place the stiffness web 22, and when it is placed in the required position, it is connected together by bolts.

[0041] The bottom of the stiffening rib 32 is welded to the connecting flange 33, and the stiffening rib 32 is welded to the outside of the U-shaped groove seat 31 to improve the rigidity of the U-shaped groove seat 31. The stiffening rib 32 is used to ensure the rigidity of the U-shaped buckle support 3, and the connecting flange 33 is used to connect with the steel embedded part skeleton 12 in the reinforced concrete structure bottom plate 1.

[0042] The U-shaped groove seat 31 is connected together by bolts through the connecting flange 33 and the steel embedded part frame 12 of the reinforced concrete structure base plate 1. The rigid web 22 of the lattice steel beam 2 is inserted into the U-shaped groove seat 31 of the U-shaped snap support 3. The insertion depth is determined according to the test foundation pressure, and then it is fixed by shear bolts.

[0043] When manufacturing the reinforced concrete structure bottom plate 1 , the steel embedded component skeleton 12 is pre-embedded, and when the elastic modulus of concrete reaches the standard requirement, the U-shaped buckle support 3 is connected to the reinforced concrete structure bottom plate 1 .

[0044] When in use, the ultimate bearing capacity of the foundation should be determined first, and the required stiffness of the pressure plate should be determined according to the maximum loading value, so as to adjust the height of the lattice steel beam 2 to ensure that the stiffness of the reinforced concrete structure bottom plate 1 meets the maximum test load. The upper lattice steel beam 2 transfers the added load to the lower reinforced concrete structure bottom plate 1 evenly with the determined stiffness, preventing the reinforced concrete structure bottom plate 1 from warping around, ensuring the stability and safety of the entire structure, and measuring more real and reliable experimental data. At the beginning of the test, the stiffness of the pressure plate is determined by the test foundation pressure calculation, and the depth of the stiffness web 22 inserted into the U-shaped recess 31 is adjusted. After it is inserted into place, the bolts are tightened and wait for the test.

[0045] The utility model solves the problem in the prior art that the pressure plate will warp around or be too thick or too heavy when loaded, and ensures efficient and convenient testing and improves test accuracy. The utility model has an ingenious structural design and has appropriate rigidity to prevent deformation and warping around, meeting the requirements of the specification; it saves materials, reduces the thickness of the pressure plate, and reduces its own weight; the rigidity is adjustable, that is, the height of the web can be adjusted according to the load size; the height is adjustable, and it can be adjusted according to the height of the weight platform pier, which is convenient for operation.

[0046] The utility model lattice steel beam and reinforced concrete structure bottom plate are connected together by bolts, and the rigid web is inserted into the U-shaped groove seat. The insertion depth is determined according to the test foundation pressure, and then fixed by shear bolts. During the test, the jack and the steel pad are placed on the pressure steel pipe. According to the base pressure during the test, it is determined whether to install the I-beam support. This adjustable height lattice composite beam pressure plate has high rigidity and light weight, can be hoisted in blocks, and is simple and convenient to assemble and use.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A height-adjustable lattice composite beam pressure plate, characterized in that: It comprises a reinforced concrete structure bottom plate, a lattice steel beam and a U-shaped buckle support, wherein the U-shaped buckle support is fixed on the reinforced concrete structure bottom plate, and the lattice steel beam is inserted into the U-shaped buckle support and fixed by shear bolts.

2. The height-adjustable lattice composite beam pressure plate according to claim 1, characterized in that: The reinforced concrete structural base plate comprises a reinforced concrete base plate and a steel embedded component skeleton, wherein the steel embedded component skeleton is arranged inside the reinforced concrete base plate.

3. The height-adjustable lattice composite beam pressure plate according to claim 2, characterized in that: The reinforced concrete bottom plate is a rectangular structure, and longitudinal and transverse steel bars are arranged inside the reinforced concrete bottom plate and are equipped with vertical hook bars.

4. The height-adjustable lattice composite beam pressure plate according to claim 2, characterized in that: The steel embedded part skeleton is a flat steel plate, an anti-slip shear key is fixed on the lower surface of the steel embedded part skeleton, and a screw is fixed on the upper surface of the steel embedded part skeleton.

5. The height-adjustable lattice composite beam pressure plate according to claim 4, characterized in that: The screw rods are arranged in double rows in parallel on the steel embedded part framework, and the spacing between the screw rods is less than 300 mm.

6. The height-adjustable lattice composite beam pressure plate according to claim 2, characterized in that: The lattice steel beam includes a plurality of cross-arranged folded-line steel beams, a rigid web is fixed at the bottom of the cross-arranged folded-line steel beam, a compression steel pipe is provided at the center position of the cross-arranged folded-line steel beam, the side wall of the compression steel pipe is fixedly connected to the cross position of the cross-arranged folded-line steel beam through four X-shaped shear webs, and the folded-line steel beams are connected by I-beam supports.

7. The height-adjustable lattice composite beam pressure plate according to claim 6, characterized in that: The cross-sectional area of ​​the middle portion of the broken-line steel beam is greater than the cross-sectional areas of the two sides.

8. The height-adjustable lattice composite beam pressure plate according to claim 7, characterized in that: The longitudinal axis of the fold line steel beam is a three-section fold line structure, the middle section of the fold line steel beam is a horizontal section, the front section and the rear section of the fold line steel beam are arranged to be inclined downward, and the front section and the rear section of the fold line steel beam form an angle of 15° to 40° with the horizontal line.

9. The height-adjustable lattice composite beam pressure plate according to claim 6, characterized in that: The upper edge of the rigid web is fixedly connected to the lower flange of the broken-line steel beam, and a row of through holes is arranged at the lower end of the rigid web.

10. The height-adjustable lattice composite beam pressure plate according to claim 9, characterized in that: The U-shaped snap-on support includes a U-shaped groove seat, stiffening ribs and connecting flanges. The connecting flanges are fixed to the bottom of the U-shaped groove seat, the stiffening ribs are arranged on the side walls of the U-shaped groove seat, and the U-shaped groove seat is provided with multiple rows of parallel connecting holes. The connecting flanges and the steel embedded part frame are connected by bolts.

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